Stropper



Jan. 9, 1923.

1,441,536 F. MOSSBERG. l

STROPPER. v FLED OCT- 4. 1920.

@Wfl/www5@ Patented Jan. 9, 1923.

' stares rrNr gerica;

FRANK IVIOSSBERG, OF ATTLEBORO, MASSACHUSETTS, `.ASSIGrNOR TO MOSSBERG PRESSED STEEL CORPORATION, OF ATTLBORO, MASSACHUSETTS, A' CORPO- RATION OF MASSACHUSETTS.

` STROPPER.

To aU rwlw/ln it may concern.

Be it known that I, FRANK lilossnnne, a citizen of the United States, and resident of rirttleboro, in the county of Bristol and State 5 of .Massachusetts, have invented certain new and useful Improvements in itroppers, of which the following is a specification.

This invention relates to stroppers designed for sharpening razors or other edged l tools, and the object of this invention is to provide a simple and practical device for simultaneously operating upon opposite sides of the blade edge to sharpen the saine, the device comprising essentially a pair of rolls each having cooperating, abrasive sur faces means also being provided for separating` the rolls when the blade is presented thereto.

lVith these and ot-her objects in view, the invention consists of certain novel features of construction, as will be more fully de-` scribed, and particularly pointed out in the appended claims. y

In the accompanying drawings:

Figure l is a side elevation of my imn proved stropper, showing the end of the blade holder in position in the casing.

Figure 2 is a sectional side elevation `of" my improved stropper.`

Figure 3 is an end elevationof the stropper with the end cap removed.

Figure 4 is a section online 4 4 of Figure 2. f

Figure 5 is a perspective view of the blade holder. i

Figure 6 is a sectional elevation showing the construction whereby the handle is caused to drive the mechanism through a pa'wl and ratchet, I

vReferring to the drawings, l0 designates the body portion of the casing, which incloses the mechanism and which casing may be constructed of a tube formed of metal, but the same is preferably formed of glass, Celluloid, or other transparent material and is provided with two end caps l1 which may be secured in position to this body portion by any suitable means. This casing is provided with a longitudinal slot l2 through it for the reception of the blade holder hereinafter described.

The stropper mechanism is preferably mounted in a frame formed separate from the casing and removably mounted thereon,

sh arpene d whereby the rolls may be separated when the blade is positioned between them,l The shaft 19 is yieldably connected toy shaft `18 by means ofcoil springs 21.

' Each roll is provided with afnarrowband 22of abrasive material, or a materialhaving an abrasive surface., formed helically about its working face, the band on the rolls being of a right and a left hand pitch respectively and arranged to provide spaces 25 between said bands, the band on one roll being set opposite to and adapted to enter the corresponding space in the opposit-e roll `whereby when the edge of a blade is `placed between these rolls', it is supported at alternate points onopposite sides of the edge and the grinding operation upon the blade is `continuous on both of its opposite edges during the rotation of the rolls. y

In order to rotate these rolls in unison I have geared them together at one end by gears 24. and Iy have mounted ahandle 23 at the opposite end ofthe rolls, which is pivoted to the short shaft 26, see Figure 6, and is provided with adisk 27 on which is mounted the4 pawl 28 to engage the ratchet 29. This ratchet wheel' ismounted on the sleeve r'30, on the opposite end of which mounted the driving gear 31 which engages the pinion 32 connected to the upper roll 1.7, wherebjY the rotation ofthe handle in one direction rotates the rollsrapidly towards each other. said rolls liieing prevented by the pawlkand ratchet from rotating in the opposite direction when the handle is inadvertently turned backwardly, so as to obviate any possibility of injuring the surface of the rolls bv tnrningthem backward `against the edge of the blade being In order to present the blade properly to the engaging workin;l sur 'ace of the rolls, lv have provided a blade holder which is constructed of two arms il?) connected by a. l'iridge 34A on which ispositicuied pins as ready means to be engaged by the thumb and finger of the operator to withdraw this holder and blade from contact with the rolls when desired.

The inner ends of these arms are slightly enlarged as at 37, their extremities 38 being reduced slightly so as to arTord an easy entrance between the shoulderedy portions 39 projecting from the ends of the rolls whereby when these rolls are rotated inthe Vdirection of the arrows, see Figure 4, these arms are gripped by these shouldered portions and caused to move inwardly and position the holder with its blade 40 mounted thereon to the nip of the rolls, the ends of thesearms bringing up against the adjustable stop screws 41.

Vhen these arms are engaged by the stop screws the reduced portions 42 thereof are brought opposite the roll shoulders 39 thereby permitting the upper roll 4under action of the springs 2l to press downwardly upon the edge of the blade whereby further rotation of the rolls serves to grind or sharpen this edge of the blade.

The outer end oi' the holder is supported between the cross pins 43 which also serve to yprevent the holder from being completely withdrawn from the Vcasing when the-enlarged ortions 37 ofthearms brine#4 e P s up against themas shown in Figure The handle Q5 `is pivotally mounted in the outer end of the shaft Q6 whereby its end portion may be turned inwardly toextend into a corresponding' hole in the casing head l1, as illustrated in Figures l and 2, so as to minimize the space required for shipping.

By supporting the edge of the blade on opposite sides it is prevented from excessive bending and a more perfect cutting edge iS obtained; then again by using a helically disposed abrading surface the greatly desired shearing action is obtained and by separating the rolls when presenting the blade to the nip thereof effectually prevents injury to the abrading surfaces, which in many instances may be leather or rubber or other yieldablailexible material carrying proper abrasive dressing.

The Jforegoing description is directed solely towards the construction illustrated, but I desire it to be understood that l' reservefthe privilege of resorting to all the mechanical changes to which the device is susceptible. the invention being defined and limited only by the terms of the appended claims.

I claim:

1.1i razor blade stropper comprising a trame in which is mounted two oppositcly disposed sharpening rolls, a blade holder mounted for lateral movement relative to the axis of `the rolls, means for rotating said rolls, and means actuated by the rotation. of said rolls for moving said holder to present the cutting edge of a blade to the nip of said rolls, to be sharpened.

2. A razor blade stropper comprising a trame, a pair oi' relatively movable sharpening rolls mounted in the iframe and noi'- mally urged toward each other, a blade holder movable toward and away from said rolls, means on the holder for separating said rolls to permit the edge of the blade to enter between them and subsequently releasing the 'rolls to move together to Contact with the edge of the blade, means for rot-ating said rolls whereby said blade is sharpened.

3. A razor blade sti-opper comprising a frame, a pair oi' relatively movable sharpeningrolls mounted in the trame and normally urged vtoward each other, means for rotating said rolls, a blade holderI movabie toward and away'from the nip of said rolls, means on the holder adapted to b e presented betweensaid rolls, whereby the holderwill be moved to present the cutting edge of a blade to the nipot said rolls when the latter are rotated in one direction, said holder beingunaifected by the rotation of' said rolls at its ,extremeI positions.

/ 4. A1 razor stropper comprising a pair oit relatively movable sharpeningrolls normally urged toward each other, means rotating said rolls in one direction for sharpcning blades. a blade holder mounted to move toward and vfrom said rolls and having a pair ot, vtrn'wardly extending arms adapted to be initially presented between therolls to separate the latter, whereby when the rolls are rotated, the holder will be moved toward the rolls to present the edge oi the blade between the nip of the rolls. while the rolls are separated, said arms having` means thereon for permitting said rolls to be releasedto move toward each, other to engage the edge of the blade, after the blade has beenpresented therebetween.

vA razor blade stropper comprising a trame, a pair of relatively movable sharpening rolls mounted in the iframe and normally urged toward each other. means for rotating said rolls. a blade holder movable toward and away from the nip ot said rolls. means on the holder adapted to be presented between said rolls, vwhereby the holder will be actuated by said rolls to present the cutting edge oi a blade to the nip .of said rolls when the latter are rotated in one direction. said holder being unaffected by the rotation ot' said rolls at its extreme positions, and adjustable stop means .for limiting the movement ci said holder toward, said rolls.

G. A razor blade stropper comprising a 'trame i-n which are mounted. two oppositely disposed sharpening rolls, a blade holder,

means for rotating said rolls, mea-ns `actuated by the rotation ot said rolls for moving said holderto present thecutting edge of a blade to the nip of said rolls, to .be sharpened, and adjustable stopmeans for limiting the .movement `ot said holder' towards said rolls.

7. .A razor st-ropper comprising a frame,`

a. pair of relatively movable sharpening rolls mounted on theframe and no-rmallyurge'd 'toward leach other, a blade `holder adapted to be manually movedt'oward and away" 'troni said rolls with a reciprocating` move-l ment, wherebya blader may be inserted in `the holder" and lmoved` toward said rolls,

means for ,separating the rolls upon veach Umovement of the holder towardth'e rolls,

whereby the `edge ot the blade maybe inserted between the nip of the rolls when in spaced relation, said rolls `being automatically released bysaid separating means for permitting them to move toward each other to engage the bladelatter theedge of the blade has been insertedtherebetween.

' SMA razor stropper comprising a frame, a pair of relatively movable sharpening;V rolls mounted on the trame and normally urged,

toward each other, a yblade holder adapted tov be manually moved toward and away trom said rolls with a reciprocating Inovevment, whereby a blade may be inserted in the holderand moved toward said rolls,

i' `means *for,separatingthe rolls upon each movement of the holder towardthe rolls, whereby the edge of? the blade may be inserted between the nip of the rolls when in spaced relation`I said rolls being automati-` cally released by said separatingr means for permitting` them to move toward each other to engage the blade afterithe edgeotthe blade has been inserted therebetween, andl adjustable stop means for limiting the movey ment of the holder toward said rolls.

S), A razor stropper comprising' a trame, a pair ot relatively movable sharpeningrolls journaled in the frame and normally urged toward each other, a drive connection between said rolls for operating said` rolls in unison, actuating means consisting ot a sleeve geared to one ot said rolls, a. shaft rotatably mounted in the sleeve and having an fmeratingv handle thereon1 and a pawl and ratchet mechanism between said shaft and sleeve whereby the sleeve will be operated in only one direction,y and a blade holder on the tramo for presentinpr the blades to said rolls.

blade may be inserted between the nip of the rolls when in spaced relatiom said separatin@ means`bein yineffective for se Jaratinefv e g h ythe rolls when the edgeoftheblade hasbeen inserted betweenv the rolls and permitting,

the rolls to automatically move toward each other. f

1l', A razor blade stropper comprising a pair ot' relatively movable sharpening rolls `normally urged towardeach other, means `for rotating'itherolls, a blade holder movable -l `toward and vaway from the nip of said rolls',

means on thek holder adapted to separate i the rolls upon each movement'ot` the holder toward the rolls wherebythe 'edge o'll the blade beinsertedbetween the nip of` the rolls when in spaced relation, said separatingmeans being actuated by the movel ment otsaid rolls for movingthe holdertopresent the edge o't` the ward the rolls to blade therebetween. n l

l2. A razor" bladeV stropper comprising a pairot' relatively movable sharpening rolls.

normally urged toward eac-h other, ineens tor rotating the rolls, a bla-deholder mov'- ab'leftowar'dand away` from the nip of said` trolls.' means on theholder` adapted to'sep- A y aratefthe rolls upon each movement oft-he `holder toward the rolls whereby theedge ot the blade may be inserted between the nip ot' the rolls when in spaced relatiomsaid separating means being actuated bythe movement of said rolls forI movingthe holder toward the' rolls to present the'edge i ot' the blade therebetween, said sepa-rating means also being ineffective for separating the rolls when the edge of the blade has been inserted between the i rolls and permitting" tlie'rolls to automaticaly move, toward eachy l other. l y l f 13. A razor blade stropper Comprising,` a pair of relatively movable sharpening' rolls normally urged toward eachother7 means y for rotating the rolls,y a blade holder movable toward and away from the nip of said rolls, an arm on the holder to slidably eX- tend between'tlie rolls to engage and separate the la-tteiupoii each'forward movement of the holder toward the rolls, said arm being slidably actuated by the movement i io of said rolls 'for'moving the holder toward the rolls to present the edge of the blade therebetween.

pair oft relatively movable sharpening; rolls normally urged toward each other, means ll; A razor blade stiopper comprising' a for rotating the rolls, a blade holder movy able toward and away from the nip ofsaid rolls.`a.n arm on the holder to slidably eX- tend between the rolls to engage and separatey the latter upon each torwardmove- `ment of the `holder toward the rolls, said arm being slidably ,.lctuate-al by tlierotation l of said rolls itor moving' the holder toward the rolls to present the edge o'lthc blade therebetween,V saidarm having means thereon to rendery itineffective -for separating the rrolls lwhen vthe `edgeof the blade has been inserted between the rolls and permit-ting the rolls Vvto automatically move toward each other. ,y y j 4 y n ,j 15. A razor blade stropper comprising a frame' having a pair of` .relatively movable sharpening rolls mounted therein and normally urged toward ,eaeh other, a lblade holder slidably mounted inthe 'trarne to d movetoward and away from the nip of said u v i i6. A razorblade.etropper'Comprising a v frame having` a pair of relatively movable sharpening rolls mounted therein and normally urged toward` each other, a` blade holder slidably mounted in ,the ,trame yto move toward and vaway vfrom the Inip ofsaid rolls7 an armon saidlholderr to move between said rolls and. Contact therewith ,for separatingthe latter" when the holder is moved toward and away rornsaid rolls, Said armbeing slidably actuated by the rodtation of said rolls, to `move the holder toward the nip otythe rolls, VSaid arm being positioned on the holder to Yseparate the rolls -a whenthe edge of the blade is inserted and removed therebetween.

` 117. A razorvbladestropper lcomprising a 'frame having apair of'` relatively-movable sharpening rolls rmounted `thefein andv nor` mally urged toward feaeh other, aV blade holder slidably imountedinltheframe to 4move toward and away from the nip of said rolls, an arm on said holder to move between said rolls. and Contact therewith for sep-l arating. the latter when the holderisgmoved towardwand away .from said rolls, Said arm beingslida-bly actuated by the rotation of said trolls,n to `move the holder `towardy lthe nip of Said rolls, said arm being positioned yon theholder to separate the rolls when the edge of` the blade is inserted .and removed eiproeating Saidfholder toward and away therebetween, and means ormanually rey fromv said rolls, `independently of the rotation of said rolls.

In testimony whereof I aflix mysignature.

FRANK Mosenne. 

